Wall shield



FIG. 1 is an isometric front perspective view of the wall shield;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side view thereof; and,

FIG. 5 is an isometric rear perspective view thereof. 

The ornamental design for a wall shield, as shown and described. 